Optimize get_mpi processing code
Optimize get_mpi processing code

Instead of reading byte-by-byte, attempt to first read word (4 bytes) at
a time into the multiprecision integer object we are building. This
results in a large reduction of total add and shift operations,
especially when we are dealing with 512 byte integers.

Signed-off-by: Dan McGee <a6e5737275ff1276377ee261739f3ee963671241@gmail.com>

toofishes/python-pgpdump